TM 1-1520-238-23
Change 10
1-402.9
1.137.
SPECIAL INSPECTION CHECKLIST – continued
Helicopter Serial No.:
Date:
Area
No.
REQUIREMENT
EVERY
Item
Status
Special
Inspection
No.
7
43A
125 FLIGHT HOURS
APPLICABLE TO AIRCRAFT WITH SERIAL NUMBERS PRIOR TO 84–25351.
MAGAZINE BAY AIRFRAME STRUCTURE INSPECTION.
a. Remove ammunition bay door B200 (para 2.2).
b. Remove ammo storage magazine (TM 9-1090-208-23-1).
c. Using a flashlight and 10X magnifier, inspect the upper right corner of the
FS 176 frame for cracks. If cracks are found, refer to paragraph h. and
complete inspection.
d. Check frame upper right side areas around holes as follows:
Hole No.
Hole Dia.
Location on Frame
Distance
Right Side
WL
BL
From Top
1
0.63
144
17
1.5
2
0.44
144
16.14
1.5
3
0.312
142.75
16
2.75
4
Remaining eight holes in upper RH aft side of frame.
Do not remove grommets, anti-chafe material, or
sealing compound.
e. Using a flashlight and 10X magnifier inspect the upper left corner of FS
176 frame. Pay particular attention to the area around all holes. If cracks
are found, refer to paragraph h. and complete inspection.
f. Using a flashlight and 10X magnifier, inspect the upper portion of the FS
176 frame cells between left BL 23.75 and right BL 23.75, and between
WL 145.5 and 141.62. If cracks are found, refer to to paragraph h. and
complete inspection.
g. Using a flashlight and 10X magnifier inspect the area of the No. 2 right/left
hand stringer connection at BL 23.75, WL 145.5. If cracks are found, refer
to paragraph h. and complete inspection.
h. If cracks are found, submit a CAT I DR.
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